Help with CEL P2CEF code

[Rainier]

Got the word that "thermostat stuck" is the issue. Replacement is the fix. Seems they've had a few of these with this issue. ....

Same situation here (US I4). Any further updates from anyone?

I'm hoping this is a bad batch of thermostats (rather than sand in the coolant system ).

 

[gcmak]

Same situation here (US I4). Any further updates from anyone?

I'm hoping this is a bad batch of thermostats (rather than sand in the coolant system ).

how many miles did you have on the car when the error appeared?

 

[Rainier]

how many miles did you have on the car when the error appeared?

Approx 1400 miles, CEL on then automatically turned off after a few start - stop cycles, then fine for a bit and again on and auto cleared itself.

I'm not sure if it just needs to 'settle in' and wont happen again, however dealer will replace (2, upper and lower I think?) thermostats in a few days when parts arrive.

Lotus did not mention anything about sand in the coolant to my dealer.

I did see the video in this thread and find it hard to believe that AMG would still have a sand issue given that the video shows people complaining about it at least 2 years ago in Mercedes cars, but who knows...